{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["Chemical"], "input": "The long - term stability of 3 - hydroxyazetidine amides is established at acidic and neutral pH and implies their value as non - proteinogenic amino acid components of peptides , providing medicinal chemists with a new class of peptide isosteres ."}
{"Chemical": ["3 - hydroxyazetidine amides", "amino acid"]}